Cisco

Router

by Hua in Network

Here is a list of commonly used CISCO device configuration commands, because too many are hard to remember, so write here for enquiries when necessary.

Enable privileged EXEC mode

Router> enable
Router#

Enter configuration mode

Router# conf t
Router(config)#

Assign a device name

Router(config)# hostname R1

Disable DNS lookup

Router(config)# no ip domain-lookup

Assign the privileged EXEC encrypted password

Router(config)# enable secret class
Router(config)#security passwords min-length 8

Assign cisco as the console password and enable login

Router(config)# line con 0
Router(config-line)# password cisco
Router(config-line)# login
Router(config-line)# exit
Router(config)#

Assign cisco as the vty password and enable login

Router(config)# line vty 0 4
Router(config-line)# password cisco
Router(config-line)# login
Router(config-line)# exit
Router(config)#

Encrypt the clear text passwords

Router(config)# service password-encryption
security passwords min-length 10

Create a banner

Router(config)# banner motd # Unauthorized access prohibited!#
***********************************************
  Warning: Unauthorized Access is Prohibited!
***********************************************

Configure and activate interfaces on the router

Router(config)# int g0/0
Router(config-if)# description Connection to PC-A
Router(config-if)# ip address 192.168.0.1 255.255.255.0
Router(config-if)# no shut
Router(config-if)#
Router(config)# int g0/1
Router(config-if)# description Connection to PC-B OR S1
Router(config-if)# ip address 192.168.1.1 255.255.255.0
Router(config-if)# no shut
Router(config-if)# exit
Router(config)# exit

Save the running configuration to the startup file

Router# copy running-config startup-config

Set the clock on the router

Router# clock set 00:00:00 29 March 2018

Erase the startup configuration file from NVRAM

Switch# show flash //if switch have been created VLANS
Switch# delete vlan.dat //删除VLANS配置文件
Router#/Switch# erase startup-config
Router#/Switch# reload

Set SSH of Router

(config)#:
hostname RouterName
service password-encryption
config ip address
ip domain-name name.com
username any_user password any_password

crypto key generate rsa
login block-for 180 attempts 4 within 120

(config-line)#
line vty 0 4
transport input ssh
login local

#
copy running-config startup-config

when test
ssh -l(letter,not number) any_user ip

show run to display config

SET IPV6

(config)# ipv6 unicast-routing
int g0/0
ipv6 address FE80::1 link-local
no shut
int G0/1
ipv6 address FE80::1 link-local
no shut

ipv6 address 2001:DB8:ACAD:A::1/64

Mysql

Ubuntu

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